How can I include PHP subs in a html <TD> tag using echo

How can I include PHP IF-ELSE subs in a html <TD> tag using echo, for example, I need to do the following:

<?
if($session->logged_in){
   echo "<h1>Logged In</h1>";
   echo "Welcome <b>$session->username</b>, you are logged in. <br><br>"
       ."[<a href=\"userinfo.php?user=$session->username\">My Account</a>] &nbsp;&nbsp;"
       ."[<a href=\"useredit.php\">Edit Account</a>] &nbsp;&nbsp;";
   if($session->isAdmin()){
      echo "[<a href=\"admin/admin.php\">Admin Center</a>] &nbsp;&nbsp;";
   }
   echo "[<a href=\"process.php\">Logout</a>]";
}
else{
?>

Code (text):

And this is what I have, see below, but it doesn't work correctly, the IF-Else get ignored:

<TD height="82" align="center" style="font-size: 8pt"><? echo "<b>Member Total:</b> ".$database->getNumMembers(); ?>
<p><? echo "There are ".$database->num_active_users; ?><? echo " registered members and ".$database->num_active_guests; ?><? echo " guests viewing the site."; ?></p>
<p>
   <? echo "<?"; ?> 
   <? echo "if(".$session->logged_in; ?><? echo "){"; ?>
   <? echo "<h1>Logged In</h1>"; ?>
   <? echo "Welcome <b>".$session->username; ?><? echo "</b>, you are logged in. <br><br>"; ?>
   <? echo "[<a href=\"userinfo.php?user=".$session->username; ?><? echo "\">My Account</a>] &nbsp;&nbsp;"; ?>
   <? echo "[<a href=\"useredit.php\">Edit Account</a>] &nbsp;&nbsp;"; ?>
   <? echo "if(".$session->isAdmin(); ?><? echo "){"; ?>
   <? echo "[<a href=\"admin/admin.php\">Admin Center</a>] &nbsp;&nbsp;"; ?>
   <? echo "}"; ?>
   <? echo "[<a href=\"process.php\">Logout</a>]"; ?>
   <? echo "}"; ?>
   <? echo "else{"; ?>
   <? echo "?>"; ?>
</p>
</TD>

Code (text):

I basically just need to have this subroutine in my table data cell, any help will be much appreciated, coz this is driving me nuts!

Thanks

 

wtf? are you echo'ing php? im confused